The collection currently features only slot machines. The feature most common to all of them is a 5x3 grid with a few exceptions, as it is in the Tower Treasure slot, where there are a traditional three rows with five pay-lines.
The team prefers to cruise around the world by introducing different cultural topics in its creations – from Asian fans and old British castles to Bollywood parties and American deserts.
The usual set of features includes a bonus round and the streak, which the studio has borrowed from the realities of land-based Bingo. Streaks can be found at the Tower Treasure, Bollywood Party and Golden Money machines.
Among more features are free spins, as it is in the Jewel Thief, pick and click sessions, as in Pick a Fortune, multipliers as in Gringo Dineros, and bonus rounds, as it is in the Kites Kingdom.
Sigma also has progressive jackpots. Among them are Hi Lo Roller, Pick a Fortune and the Lucky Fairy. This last one also has a unique feature called the upgrading symbols.